validate build prerequisites and print a coherent error message when validation fails
validate build prerequisites and print a coherent error message when validation fails

JanMarvin/rstudio,sfloresm/rstudio,jzhu8803/rstudio,more1/rstudio,maligulzar/Rstudio-instrumented,suribes/rstudio,brsimioni/rstudio,tbarrongh/rstudio,jar1karp/rstudio,more1/rstudio,JanMarvin/rstudio,sfloresm/rstudio,brsimioni/rstudio,piersharding/rstudio,brsimioni/rstudio,tbarrongh/rstudio,brsimioni/rstudio,edrogers/rstudio,suribes/rstudio,edrogers/rstudio,thklaus/rstudio,githubfun/rstudio,jzhu8803/rstudio,suribes/rstudio,piersharding/rstudio,edrogers/rstudio,maligulzar/Rstudio-instrumented,thklaus/rstudio,suribes/rstudio,vbelakov/rstudio,maligulzar/Rstudio-instrumented,githubfun/rstudio,thklaus/rstudio,more1/rstudio,tbarrongh/rstudio,jzhu8803/rstudio,tbarrongh/rstudio,JanMarvin/rstudio,suribes/rstudio,suribes/rstudio,tbarrongh/rstudio,more1/rstudio,piersharding/rstudio,jar1karp/rstudio,piersharding/rstudio,jrnold/rstudio,pssguy/rstudio,jrnold/rstudio,piersharding/rstudio,john-r-mcpherson/rstudio,nvoron23/rstudio,tbarrongh/rstudio,JanMarvin/rstudio,edrogers/rstudio,jar1karp/rstudio,vbelakov/rstudio,vbelakov/rstudio,nvoron23/rstudio,pssguy/rstudio,tbarrongh/rstudio,sfloresm/rstudio,pssguy/rstudio,githubfun/rstudio,pssguy/rstudio,john-r-mcpherson/rstudio,nvoron23/rstudio,brsimioni/rstudio,more1/rstudio,edrogers/rstudio,githubfun/rstudio,maligulzar/Rstudio-instrumented,jar1karp/rstudio,jar1karp/rstudio,brsimioni/rstudio,vbelakov/rstudio,john-r-mcpherson/rstudio,vbelakov/rstudio,JanMarvin/rstudio,maligulzar/Rstudio-instrumented,jrnold/rstudio,vbelakov/rstudio,jrnold/rstudio,JanMarvin/rstudio,githubfun/rstudio,jrnold/rstudio,maligulzar/Rstudio-instrumented,sfloresm/rstudio,jar1karp/rstudio,sfloresm/rstudio,piersharding/rstudio,pssguy/rstudio,piersharding/rstudio,jrnold/rstudio,nvoron23/rstudio,sfloresm/rstudio,jar1karp/rstudio,nvoron23/rstudio,piersharding/rstudio,jzhu8803/rstudio,jar1karp/rstudio,more1/rstudio,more1/rstudio,jar1karp/rstudio,edrogers/rstudio,githubfun/rstudio,edrogers/rstudio,more1/rstudio,thklaus/rstudio,john-r-mcpherson/rstudio,vbelakov/rstudio,suribes/rstudio,pssguy/rstudio,suribes/rstudio,john-r-mcpherson/rstudio,thklaus/rstudio,sfloresm/rstudio,nvoron23/rstudio,vbelakov/rstudio,nvoron23/rstudio,jrnold/rstudio,jzhu8803/rstudio,john-r-mcpherson/rstudio,jzhu8803/rstudio,tbarrongh/rstudio,maligulzar/Rstudio-instrumented,thklaus/rstudio,JanMarvin/rstudio,githubfun/rstudio,JanMarvin/rstudio,brsimioni/rstudio,githubfun/rstudio,maligulzar/Rstudio-instrumented,maligulzar/Rstudio-instrumented,john-r-mcpherson/rstudio,john-r-mcpherson/rstudio,jrnold/rstudio,JanMarvin/rstudio,thklaus/rstudio,jzhu8803/rstudio,jrnold/rstudio,sfloresm/rstudio,pssguy/rstudio,piersharding/rstudio,brsimioni/rstudio,jzhu8803/rstudio,thklaus/rstudio,edrogers/rstudio,pssguy/rstudio